I have been thinking about getting a tracer unit but at a recent 24 hr game I found that they're really ineffective if someone is attacking a fixed position.
We were taking fire but I wasn't able to get a bearing until the guy with the tracer unit started up and then we had them. Followed the BB's back home and Bob's your uncle. I think he was on a full tracer load though.
“We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.”
To those Rough men... Thank You.